Piranha CMS Cross-site Scripting vulnerability

published 2024-12-20 22 mo ago modified 2026-06-17 4 mo ago also GHSA-mmx8-vrfg-hfmq , EUVD-2024-3601

cvss: 4.7; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 39%
public exploits: 0; none known

A stored cross-site scripting (XSS) vulnerability in Piranha CMS 11.1 allows remote attackers to execute arbitrary JavaScript in the web browser of a user, by creating a page via the /manager/pages and then adding a markdown content with the XSS payload.

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 22 mo ago (2024-12-20)

Exploit prediction

0.46% chance of exploitation in the next 30 days, higher than 39% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

sec-fortress.github.io https://sec-fortress.github.io/posts/articles/posts/CVE-2024-55341.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	4.7	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N
CNA	3.1	4.7	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N
GitHub	3.1	4.7	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N

Affected packages

ecosystem	package	affected	fixed in
nuget	Piranha	<=11.1.0	no fix listed

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

sec-fortress.github.io /posts/articles/posts/CVE-2024-55341.html
web, exploit, third-party-advisory
github.com /PiranhaCMS/piranha.core
package, product
nvd.nist.gov /vuln/detail/CVE-2024-55341
advisory

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary